Year 7 - Science
Separating an insoluble solid from a liquid
Separation techniques
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit covers techniques for separating mixtures, including filtration, evaporation, distillation, and chromatography, as well as identifying pure substances. Conduct experiments safely, record observations, evaluate methods, and suggest improvements.
Lesson Summary
You will learn to use your understanding of the properties of solids and liquids to work out how to separate some mixtures.
Key Notes
- Magnets attract iron and steel
- Insoluble solids can be separated from a liquid using a filter by a process known as filtration.
- Filter paper is folded to make a pocket that fits in a filter funnel for filtering fine particles
- A drop of water on a filter funnel helps keep the filter paper cone open for easy filtering
Vocabulary To Learn
- filtration: The process of separating an insoluble substance from a liquid using a filter.
- filter paper: Paper with tiny holes, placed inside the filter funnel to separate an insoluble solid from a liquid.
- filter funnel: A cone-shaped tool with a tube, placed in the top of a conical flask during filtration.
- residue: The insoluble solid that remains in the filter paper.
- filtrate: The liquid that passes through the filter paper, separating from the insoluble solid.
Common Mistakes To Avoid
- A funnel is the same as a filter. Dissolved substances will be collected in the filter paper.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
Magnets attract iron and steel. Insoluble solids can be separated from a liquid using a filter by a process known as filtration.
2. Define this scientific word and use it in context. 'filtration'
The process of separating an insoluble substance from a liquid using a filter. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: A funnel is the same as a filter. Dissolved substances will be collected in the filter paper. Correction: A filter separates materials. Dissolved substances are smaller than the pores in the filter paper and so will pass through with the liquid.
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